* Afrocentrists argue that all other civilizations of the ancient world were either black or owe their achievements to the theft of African ideas. India and China are, in the Afrocentric model, indebted to black ingenuity. "The early inhabitants of India were black," writes John Jackson. "They have Negroid features, dark skin, and woolly hair. " Indeed, those who built the Mohenjo Daro and Harappa civilizations in India were not Indians at all, he claims, but "Asiatic Ethiopians. " Similarly, the great philosophy and art that emerged in China during the Shang dynasty really derives from black Africans. In They Came Before Columbus, Ivan Van Sertima argues that it was Africans, rather than Columbus, who discovered America. Scrutinizing artifacts of the Olmec civilization of ancient Mexico to find Negro features, Van Sertima argues that Africans using advanced navigational techniques migrated to produce the mathematical and architectural wonders wrongly attributed to the Mayas, Incas, and Aztecs.